$fn = 64;

// --- Parameters ---
num_slots = 5;         // Number of palette slots
slot_width = 8;        // Thickness of the slots (fits most standard palettes)
slot_depth = 35;       // How deep the palettes sit in the stand
wall_thickness = 4;    // Thickness of dividers between slots
stand_width = 100;     // Total width of the stand
slot_angle = 15;       // Tilt angle of the palettes (degrees)
base_thickness = 5;    // Thickness of the solid base floor
corner_radius = 3;     // Radius for the rounded outer corners

// --- Calculated Values ---
// Calculate Y spacing to maintain uniform wall thickness between angled slots
y_spacing = slot_width + wall_thickness + (slot_depth * sin(slot_angle));
stand_depth = wall_thickness + (num_slots * y_spacing);
stand_height = base_thickness + (slot_depth * cos(slot_angle));

// Helper module for a box with rounded vertical corners
module rounded_box(w, d, h, r) {
    hull() {
        translate([r, r, 0]) cylinder(r=r, h=h);
        translate([w-r, r, 0]) cylinder(r=r, h=h);
        translate([r, d-r, 0]) cylinder(r=r, h=h);
        translate([w-r, d-r, 0]) cylinder(r=r, h=h);
    }
}

module palette_stand() {
    difference() {
        // Main Body
        rounded_box(stand_width, stand_depth, stand_height, corner_radius);

        // Angled Slots
        for(i = [0 : num_slots - 1]) {
            cutter_w = stand_width + 2;
            cutter_h = stand_height * 2;
            
            y_pos = wall_thickness + i * y_spacing;
            
            // Offset Z so the lowest point of the angled cut rests exactly on the base floor
            z_offset = base_thickness + (slot_width * sin(slot_angle));
            
            translate([-1, y_pos, z_offset])
            rotate([-slot_angle, 0, 0])
            cube([cutter_w, slot_width, cutter_h]);
        }

        // Center cutout for easy grabbing and material saving
        cutout_width = stand_width * 0.6;
        side_rail_width = (stand_width - cutout_width) / 2;
        
        // Leaves solid walls on the sides, front, back, and bottom
        translate([side_rail_width, wall_thickness * 1.5, base_thickness])
        cube([cutout_width, stand_depth - (wall_thickness * 3), stand_height + 1]);
    }
}

palette_stand();